|
| 1 | +"""宪法原则基类定义。 |
| 2 | +
|
| 3 | +本模块定义了几何宪法式 AI 的核心抽象: |
| 4 | +- Severity: 违规严重性等级 |
| 5 | +- ViolationResult: 违规检测结果 |
| 6 | +- ConstitutionPrinciple: 宪法原则基类 |
| 7 | +
|
| 8 | +用户可以继承 ConstitutionPrinciple 实现自定义的安全规则。 |
| 9 | +""" |
| 10 | + |
| 11 | +from abc import ABC, abstractmethod |
| 12 | +from dataclasses import dataclass, field |
| 13 | +from enum import Enum |
| 14 | +from typing import TYPE_CHECKING, Any |
| 15 | + |
| 16 | +if TYPE_CHECKING: |
| 17 | + from .types import AIDecision, SceneState |
| 18 | + |
| 19 | + |
| 20 | +class Severity(Enum): |
| 21 | + """违规严重性等级。 |
| 22 | +
|
| 23 | + 用于定义宪法原则被违反时的严重程度, |
| 24 | + 影响最终安全分数的计算和推荐动作。 |
| 25 | + """ |
| 26 | + |
| 27 | + CRITICAL = 1.0 # 关键:必须立即阻止(如即将碰撞) |
| 28 | + HIGH = 0.8 # 高:强烈警告,建议干预 |
| 29 | + MEDIUM = 0.5 # 中:一般警告,需要注意 |
| 30 | + LOW = 0.2 # 低:轻微提示,可忽略 |
| 31 | + |
| 32 | + |
| 33 | +@dataclass |
| 34 | +class ViolationResult: |
| 35 | + """违规检测结果。 |
| 36 | +
|
| 37 | + Attributes: |
| 38 | + violated: 是否违反原则 |
| 39 | + severity: 违规严重性 |
| 40 | + confidence: 检测置信度 (0.0-1.0) |
| 41 | + description: 违规描述(人类可读) |
| 42 | + metrics: 相关度量值(如距离、TTC 等) |
| 43 | + correction_hint: 纠正建议(可选,用于生成训练信号) |
| 44 | + """ |
| 45 | + |
| 46 | + violated: bool |
| 47 | + severity: Severity |
| 48 | + confidence: float |
| 49 | + description: str |
| 50 | + metrics: dict[str, float] = field(default_factory=dict) |
| 51 | + correction_hint: dict[str, Any] | None = None |
| 52 | + |
| 53 | + def to_dict(self) -> dict[str, Any]: |
| 54 | + """转换为字典格式。""" |
| 55 | + return { |
| 56 | + "violated": self.violated, |
| 57 | + "severity": self.severity.name, |
| 58 | + "severity_weight": self.severity.value, |
| 59 | + "confidence": self.confidence, |
| 60 | + "description": self.description, |
| 61 | + "metrics": self.metrics, |
| 62 | + "correction_hint": self.correction_hint, |
| 63 | + } |
| 64 | + |
| 65 | + |
| 66 | +class ConstitutionPrinciple(ABC): |
| 67 | + """宪法原则基类。 |
| 68 | +
|
| 69 | + 所有安全规则都应继承此类并实现 evaluate 方法。 |
| 70 | + 这是 A-YLM 几何宪法式 AI 的核心抽象。 |
| 71 | +
|
| 72 | + Example: |
| 73 | + >>> class NoCollisionPrinciple(ConstitutionPrinciple): |
| 74 | + ... @property |
| 75 | + ... def name(self) -> str: |
| 76 | + ... return "no_collision" |
| 77 | + ... |
| 78 | + ... @property |
| 79 | + ... def severity(self) -> Severity: |
| 80 | + ... return Severity.CRITICAL |
| 81 | + ... |
| 82 | + ... def evaluate(self, state, decision) -> ViolationResult: |
| 83 | + ... # 实现碰撞检测逻辑 |
| 84 | + ... collision = check_collision(state.obstacles, decision.trajectory) |
| 85 | + ... return ViolationResult( |
| 86 | + ... violated=collision, |
| 87 | + ... severity=self.severity, |
| 88 | + ... confidence=0.95, |
| 89 | + ... description="检测到碰撞风险" if collision else "安全", |
| 90 | + ... ) |
| 91 | + """ |
| 92 | + |
| 93 | + @property |
| 94 | + @abstractmethod |
| 95 | + def name(self) -> str: |
| 96 | + """原则名称(唯一标识符)。""" |
| 97 | + pass |
| 98 | + |
| 99 | + @property |
| 100 | + @abstractmethod |
| 101 | + def severity(self) -> Severity: |
| 102 | + """默认严重性等级。""" |
| 103 | + pass |
| 104 | + |
| 105 | + @property |
| 106 | + def description(self) -> str: |
| 107 | + """原则描述(可选覆盖)。""" |
| 108 | + return f"宪法原则: {self.name}" |
| 109 | + |
| 110 | + @property |
| 111 | + def enabled(self) -> bool: |
| 112 | + """是否启用(可动态控制)。""" |
| 113 | + return True |
| 114 | + |
| 115 | + @abstractmethod |
| 116 | + def evaluate( |
| 117 | + self, |
| 118 | + state: "SceneState", |
| 119 | + decision: "AIDecision", |
| 120 | + ) -> ViolationResult: |
| 121 | + """评估 AI 决策是否违反此原则。 |
| 122 | +
|
| 123 | + Args: |
| 124 | + state: 当前场景状态(包含障碍物、自车状态等) |
| 125 | + decision: AI 的决策(包含规划轨迹、控制指令等) |
| 126 | +
|
| 127 | + Returns: |
| 128 | + ViolationResult: 违规检测结果 |
| 129 | + """ |
| 130 | + pass |
| 131 | + |
| 132 | + def __repr__(self) -> str: |
| 133 | + return f"{self.__class__.__name__}(name={self.name}, severity={self.severity.name})" |
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